Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b9179c7cd95273d7eae40a981cbc18c8b32aed8c4a8bb73202d5ce5de29748e' 
  AND token = 'PVX/eA/TYwMfKdS2L39sYM/eLHV8e0LkeCjfSqW7VBk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}